// ConsoleTools
// Copyright (C) 2017-2024 Dust in the Wind
// 
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

// --------------------------------------------------------------------------------
// Bugs or feature requests
// --------------------------------------------------------------------------------
// Note: For any bug or feature request please add a new issue on GitHub: https://github.com/lastunicorn/ConsoleTools/issues/new/choose

using System;
using System.Collections.ObjectModel;
using System.Linq;
using DustInTheWind.ConsoleTools.Mvc.UseCases;

namespace DustInTheWind.ConsoleTools.Mvc;

public class UseCaseCollection : Collection<UseCaseCollectionItem>
{
    public void Add(string key, IUseCase useCase)
    {
        Add(new UseCaseCollectionItem(key, useCase));
    }

    protected override void InsertItem(int index, UseCaseCollectionItem item)
    {
        if (this.Any(x => x.Key == item.Key))
            throw new ArgumentException("There is another use case with the same key.", nameof(item.Key));

        base.InsertItem(index, item);
    }

    public bool Contains(string commandKey)
    {
        return commandKey != null && this.Any(x => x.Key == commandKey);
    }

    public bool Contains(IUseCase useCase)
    {
        return useCase != null && this.Any(x => x.UseCase == useCase);
    }

    public IUseCase SelectCommand(string commandName)
    {
        IUseCase useCase;

        if (string.IsNullOrEmpty(commandName))
        {
            useCase = Items
                .Select(x => x.UseCase)
                .OfType<HelpUseCase>()
                .FirstOrDefault();

            if (useCase == null)
                throw new ConsoleFrameworkException("Please provide a use case name to execute.");
        }
        else
        {
            if (!Contains(commandName))
                throw new ConsoleFrameworkException("Invalid use case.");

            useCase = this[commandName];
        }

        return useCase;
    }

    public IUseCase this[string commandKey]
    {
        get
        {
            if (commandKey == null)
                return null;

            return Items
                .Where(x => x.Key == commandKey)
                .Select(x => x.UseCase)
                .FirstOrDefault();
        }
    }
}